Window-sash latch



B. SPIELMANN.

wmoow SASH LATCH.

APPLICATION FILED FEB. I5; 1921.

2 907 Patented Jan. 10, 1922.

INVENTOR.

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WIN DOW-SASH LATCH.

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Application filed February 15,1921. Serial No. 445,272.

To aZZ whom it may concern:

Be it known that I, BERNHARD SPIEL- MANN, a citizen of the United States, residing at San Francisco, in the county of San Francisco, State of California, have invented a new and useful Window-Sash Latch, of which the following is a specification in such full and clear terms as will enable those skilled in the art to construct and use the same.

This invention relates to improvements in window sash locks, and the object of the invention is to provide means for locking the lower sash to the window frame and the upper sash between the lower sash and the window frame by means of a double acting lock.

Another object of the invention is to pro;

vide a lock that will prevent the window sash from rattling in any open or closed position of the window.

Another object of the invention is to provide a lock that will have few parts and be of strong construction.

Other objects of the invention will appear as the description proceeds.

An embodiment of the invention is shown in the drawings in which the same reference numerals is applied to the same portion throughout, but I am aware there may be modifications thereof.

Figure 1 is a perspective view of the lock as applied to the window sash, portions of the lower and upper sash being shown.

Figur 2 is a plan view of the lock.

Figure 3 is a side elevation looking from the front of Fig. 2.

Figure 4: is an end view looking from the right of Fig. 2.

Figure 5 is a view of the operating mechanism.

In the drawings:

The numeral 1 indicates th frame of the lock which has openings for slidably mount ing a square bar 2, and at right angg/ies to bar 2 is slidably mounted a bar 3. eans for reciprocating bar 2 consist of a knob 4:, a pin 5 and the cam 6 acting on the screw heads 7 and 8 in the bar 2.

When the knob 4 is turned to cause the cam 6 to engage th screw head 8 and push the bar 2 out in the direction of the arrow at, a cam 9 on the side of bar 2 will engage the end of bar 3, and push it out in the direction of the arrow 6. When the knob is turned in the opposite direction the Specification of Letters'Patent.

Patented Jan. io, reels.

cam will engage screw head 7 and push the bar 2 back, the bar 3 being returned by means of a leaf spring 10, one end of which is held to th base of the frame 1 by the screw 11, the other end engaging a slot in bar 3.

Both bars 2 and 3 are provided with a shoe 12 which is pivoted atl3 and is free to tilt up or down, but is held in a central position by a spring 14. The shoe 12 is provided with rubber tips 15 and 16 inserted therein;

A hole 17 is provided for convenience in placing th screw 11 on the spring 10.

Holes 20 are provided for screws to hold the lock to the sash. Holes 21 and 22 admit of placing the screws 7 and 8. g

In operation the lock frame is fixed on the top rail of the lower window sash in such a position that when the knob f is turned to throw the bars 2 and 3 outward, the rubber tips of the shoe in bar 2 will press lightly on the jamb of the window, and the rubber tips of th shoe on the bar 3 will press lightly on the upper window sash.

ny movement up or down of either the upper or lower sash will cause theshoes to turn on their pivots and wedge the sash tightly in the frame and thus prevent movement up or down, as the more force exerted to move the windows will cause them to bind th tighter.

From the above description it will be seen that the upperand lower window sash may be held in any adjusted open or closed position, and that a novel and useful invention has been evolved.

What I claim is as follows, but various modifications may be made in the construction shown in the drawings and above par ticularly described form, within the purview of my invention.

1. A window sash lock comprising a frame, a slidable bar in said frame, spaced projections on said bar, a pivoted cam adapted to engag said projections and slide said bar in alternate (llI'GCtlOllS, a knob for turning said cam, a second bar slidable at right angles to said first bar, a cam projection from said first bar adapted to engage the end of said second bar and slide it away therefrom, a spring acting to normally hold said second bar against said first bar, pivoted shoes on the free ends of said bars, and springs adapted to hold said shoes in a balancedjcentral' position.

2. A WlIlClOW'SflSll lock comprising incombination an upper and lower Window sash .mounted in a frame; alock fram fixed to the top rail of said lower Window, a slidable 5 bar mounted in said lock'frame an'dadaPted to "engage the jamb of-said window frame,'

and a second slidable bar mounted insaid frame adapted to engage the sash of the upper Window frame, a piveted shoe on' the 10 end of each of said bars with resilient in B SPIELMANN. 

